If installed on the same machine, Tectia Client and Tectia Server should always be upgraded to be the same version, because there are dependencies between the common components.

Check if you have some Secure Shell software, such as earlier versions of Tectia products or third-party Secure Shell server or client, running on the machine where you are planning to install the new Tectia versions.

Before installing Tectia products on Unix platform, stop any OpenSSH or other third-party Secure Shell servers running on port 22, or change their listener port. You do not need to uninstall the OpenSSH software.

The following table shows you which Tectia versions you need to uninstall before you can upgrade to Tectia Client and Server 6.3. Versions marked "upgrade on top" will be automatically removed from the host during the installation procedure.